Corrosion Preventive Compound, Solvent Cutback, Cold Application

General Description

Mil-C-16173 Grade 4 is an dark colored, high melting point, resilient coating designed to provide long term protection of metal surfaces. Mil-C-16173 Grade 4 is applied as a solution in a volatile solvent. The residual film, after solvent evaporation, is highly resistant to salt water and salt spray. Mil-C-16173 Grade 4 is supplied pre-dispersed in mineral spirits to simplify handling and application of the product.


Performance Results

Neat Product Film Thickness Days to Fail
  Mils Microns Humidity Cabinet
on Polished Steel
5% Salt Spray
  4.00 101.6 60+ 60+



Mil-C-16173 Grade 4 can be applied by dipping the parts to be protected in a vat or spraying the parts to be protected with air sprayers, pump type sprayers or by pouring the product over the parts. Removal of protective films is accomplished by using a steam cleaner or washing the parts in mineral spirits.

Physical Properties

Appearance Thick, Dark Brown Liquid
Odor Solvent Odor
Specific Gravity 0.90
Flash Point (minimum) 108º F
Melting Point Liquid as Provided


Mil-C-16173 Grade 4 meets or exceeds the following MIL-SPECS:
MIL-C-83933, MIL-C-0083933A (MR), MIL-C-16173E, Grade 4, Mil-C 11796 class 3, Class I, MIL-C-62218 (AT).


Mil-C-16173 Grade 4 is available in UN approved 5 gallon pail, 55 gallon drums and bulk quantities.


Observe warning label on containers. Normal precautions for industrial chemicals apply.

pdf Mil-C-16173-Grade-4-PB (26 KB)